Thread-conducting device for gripper looms



Dec, 16, 1924.

G. SIEBER THREAD CONDUCTING DEVICE FOR GRIPPER LOOMS Filed Nov. 26. 1923ooooo ooo Inventor:

K ttorlyg Patented Dec. 16, 1924.

UNITED STATES GOTTWALT SIEBER, 0F PLAUEN', GERMANY.

THREAD-CONDUCTING DEVICE FOR GRIPPER LOOMS.

Application filed November 26, 1923. Serial No. 677,024.

To all whom it may concern:

Be it known that I, Go'r'rwALT SIEBER, a citizen of the German Republic,and a resident of Plauen, Saxony, Germany, have invented a new anduseful Improved Thread- Conducting Device for Gripper Looms, of whichthe following is a specification.

This invention relates to a device for conducting the weft threads fromthe bobbin board to the thread board of a gripper loom for themanufacture of a chenille preliminary fabric, especially such asrequired for the manufacture of Axminster carpets. There is required forthis kind of work a loom in which a large number of threads of difierentcolors is introduced between the warp threads in a certain succession asren dered necessary by the pattern to be produced. Introducing said weftthreads between the warp threads can be effected best by means of agripper shuttle to which the free ends of the various weft threads areheld forth. for being grasped selectively, which is done with the aid ofthe above-mentioned thread board. The weft threads must be conductedfrom the bobbin board to the thread board in such a manner that theycannot get entangled with each other, but can be drawn in again if anythereof should tear. The arrangement must be such that each weft threadcan be pulled off its respectiVe bobbin and through between the warpthreads without any impediment by warp threads, knots or the like.

The device forming the subject-matter of this invention answers allthese require ments, and the gist thereof consists in the feature thatthe connection between the bobbin board and the thread board isefi'ected by means of grooveor channel-forming members apt to conductthe threads secure- 1y from one board to the other board. Theseconducting members are movably at tached to the bobbin board in such aman ner that they can follow all movements thereof, and this boarditself is provided with suitably large apertures or passages which,although being so large, do not impair the secure gripping of the weftthreads by the shuttle grippers, as is all more fully describedhereinafter.

My invention is illustrated, by way of example, in the accompanyingdrawing, in which Figure 1 is a perspective representation of the bobbinframe and its connection with the thread board; Figure 2 is a verticalsection through the thread board drawn to an enlarged scale; Figure 3 isa front view of the same; Figure 4 is a verti cal transverse sectionthrough one of the thread conducting members; Figure 5 is a horizontalsection in the plane AA of Fig ure 2; Fig. 6 illustrates how the weftthread is grasped by a gripper; and Figure 7 is a perspective View of asingle individual thread-member, drawn to an enlarged scale.

The bobbin frame consists, in the example shown in Figure 1, of thehorizontally disposed bobbin board 1 to which is attached a plurality ofupright mandrils 2, each of which receives a bobbin. Above these partsis a plurality of horizontal bars 3 having bores through which thethreads coming from the bobbins, i. e. the weft threads, are passed; andabove the bars 3 is an oblique lath grate t, on the laths of which arearranged rows of thread guides 5 which are U-shaped in section as shownin Figure 4. The object of these guide members 5 is to conduct the weftthreads securely on their way from the bobbin frame (.0 the thread board6.

The lower part of the thread board consists of parallel vertical members6 and 7 (Figs. 2' and 3), of which the members 6 are located in front ofthe members 7. These latter are provided with apertures corresponding inshape to the shape of the thread guide members 5, each of which extendswith its front end 5 into one of said apertures, the ends of the legs ofthe U be ing then bent round in the manner shown in Figures 5 wherebythe two parts are connected with each other in such a manner that theguide members 5 are capable of a f certain vertical movement in saidmembers 7. The rear ends of the guide-members or channels 5 rest looselyon the laths 4. and are kept on their proper places either by notchesprovided in said laths or by pairs of pins, as indicated in Figure 1.This loose connection of the guide members with the laths is necessaryin order to enable the f0."- mer to give way in the case of a shiftingof the thread board in horizontal or vertical direction.

The thread guide channels 5 converge strongly towards the thread board6, the distance between the threads at the latter amounting to less than2 0111., whereas their distance on the laths 4 is such that the rear endof each guide member lies approximate lHI thread ends.

usual tubular thread end holders, the abovely vertically above itsappertaining bobbin, or the mandrel thereof respectively, so that therespective thread is drawn off that bobbin approximately verticallyupwards and cannot possibly get entangled with any of the neighbouringthreads. The bars 8 wh1ch are arranged between the bobbins and thethread guides 5 prevent entangling also 1f any thread should be swunglaterally owlng to a comparatively quick pull thereof.

It is obvious that the thread guide members 5, i. e. the channel-shapedguides, may be replaced by equivalent guide members, for instance piecesof tube, a grating or gratings, or the like, and it is also possible tocombine a certain number of the threads to a set without departing fromthe invention.

In order to be able to insert again and in a convenient manner a threadwhich had been torn, the thread board is divided into individual members6 and 7, of which the former are wedge-shaped in horizontal section andhave each vertical flanges at the face opposite the appertaining member7 which is connected with the respective member 6 by two connectingpieces 6; one thereof being located at the top, the other at the foot ofthe respective two members 6 and 7.

Each member 6 is provided with a plurality of bores 9 lying opposite theaper tures 7 of the member 7; these bores terminate at one of theoblique surfaces of the individual wedges, and a flat spring 10 isattached near bore in such a manner that the thread is tension-held soas to hold forth its end to the gripper in proper operative position.Although I prefer the wedgeshaped form of the members 6, this form isnot indispensably requisite, as instead thereof flat members withgrooves in one side may be employed, may be in connection with springsor equivalent means for retaining the In contradistinction to thedescribed improved holder offers the advantage that the gripping member11 6) of the weft gripper can engage the holder (6) behind the end ofthe bore (9), or its equivalent, and engages the thread in when beingwithdrawn, whereby it is prevented from-gliding oif upwards or downwardsso that also faults in the fabric resulting from such undue movement areobviated.

The upper part of the thread board 6 is formed by a kind of grating 8consisting of parallel vertical bars forming guides for the members 6and 7 which can be shoved along them as shown, by way of example, in therighthand upper part of Figure 8. This arrangement renders it possibleto lift any of the vertical rows of the thread guide channels 5 out ofthe whole set so as to afford access to any channel and its thread andrendering it possible to draw in another thread in lieu of a torn one,without any interruption in the weaving work.

I claim:

1. A device for conducting the weft threads from the bobbin board to thethread board of a gripper loom, comprising in combination, a bobbinboard, a thread board, and thread conducting members extending from thebobbin board to the thread board, commencing approximately verticallyabove the appertaining bobbins and being movably connected with bothboards, as set forth.

2. A device for conducting the weft threads from the bobbin board to thethread board of a gripper loom, comprising, in combination, a bobbinboard, mandrels thereon, and bobbins on the mandrels; a thread boardconsisting of parallel vertical members adapted to be singly lifted, andthread conducting members arranged to form horizontal rows and verticalrows and extending from the bobbin board to the thread board and beingmovably connected with both boards, the ends of the conducting membersforming vertical thread board members and being adapted to be liftedtogether therewith, as set forth.

3. A device for conducting the weft threads from the bobbin board to thethread board of a gripper loom, comprising, in combination, a bobbinboard, mandrels thereon, and bobbins on the mandrels; a thread boardconsisting of parallel vertical members, and thread conducting membersarranged to form converging horizontal rows and converging vertical rowsand extending from the bobbin board to the threadboard and being movablyconnected with both boards, the rear ends of said conducting memberslying approximately above the appertaining mandrels, as set forth.

4. A device for conducting the weft threads from the bobbin board to thethread board of a gripper loom, comprising, in combination, a bobbinboard, mandrels thereon, and bobbins on the mandrels; a thread boardconsisting of parallel vertical members, guides for the same, and thread0011- ductlng members arranged to form horizontal rows and vertical rowsand extending from the bobbin board to the thread board and beingmovably connected with both boards, as set forth.

5. A device for conducting the weft threads from the bob-bin board tothe thread board of a gripper loom, comprising, in combination, a bobbinboard, mandrels thereon, and bobbins on the mandrels; a thread boardconsisting of parallel vertical members which are of wedge-shapedsection on the side opposite the thread board, and thread conductingmembers arranged to form horizontal rows and vertical rows and extendingfrom the bobbin board to the thread board being movably connected Withboth boards, as set forth.

6. A device for conducting the Weft threads from the bobbin board to thethread board of a gripper loom, comprising in combination, a bobbinboard, mandrels thereon, and bobbins on the mandrels; a thread boardconsisting of parallel vertical members, guides for the same and threadconducting members arranged to form converging horizontal rows andconverging vertical rows and extending from the bobbin board to thethread board and being movably connected with both boards, the rear endsof said conducting members lying approximately above the appertainingmandrels, as set forth.

In testimony thereof I affiX my signature in presence of two witnesses.

GOTTVVALT SIEBER. Vitnesses:

M. ORooKEn, J 01-1. THAUBER.

